I have recorded several 10 hour sessions of the Olympics and found that while fast forwarding, if I hit the SKIP button, I can jump forward by 15 minutes, 30 minutes or an hour - seemingly at random. I can't figure out how to consistently jump 15 minutes at a time. It seems for 1 hour shows, it will consistently only skip 15 minutes but for the long recordings, it seems to jump in varying increments without a pattern (that I can figure out). I have tried waiting between presses, returning to play then FF+SKIP, etc. Is there some pattern/control over this? Premiere XL

When i do that it skips the ticks that are on the progress bar. Which are in 15 min increments

That's how it works for me on shorter (1 hour) shows. But on the longer ones it is jumping 15 minutes to an hour at a time and I can't figure out how to control it - like jump 15 minutes for a while, then maybe hour long ones.

Count the number of ticks you see in progress bar and then divide total time by that number to get the time increment of each tick. For example for a 4 hour (240 min) recording I have 8 ticks shown so each tick is 240/8 = 30 min
For a 1 hour (60 min) recording I have 4 ticks shown so each tick is 60/4 = 15 min

Longer recordings will have longer time intervals between each tick by design.

nope, your wrong. I have 30 sec skip enabled on my premier and a hold down of button does result in advance to end/beginning.
I am not happy about the tick marks extending to the hour point on longer programs. Ex.. Olympics. I want to be able to quicky move forward 15 or 30 minutes. 1 hour is too long. Is there a way to use some kind of macro or button press to move ahead 15 or 30 minutes at a time? Without this I waste allot of time on X3 FF mode. It would also help if Tivo put in a X4 FF mode.

Personally I FF through the Olympics I record, in case there is a bit I want to see.. (We're past the events I care about, but I'm still recording at least the prime time events... Even though some people hate them, the stories about the athletes are sometimes interesting.. though it seems like they're doing way fewer of them this time.)